Contamination of potato tubers by heavy metals and their influence on the formation of phenolic substances

Abstract

increased content of cadmium and lead in soil was manifested by their increased concentration in potato tubers in such range that contents were several times higher (cd 0.106-0.357, Pb 0.318-0.483 mg.kg -1 FM) then the limit value. increased content of zinc was not manifested by increased content in tubers of potatoes (Zn 4.939-6.868 mg.kg -1 FM). content of total phenolics (TP) in potato samples of hontiansky and Banskoštiavnický region was in the range of 263.59-920.38 mg.kg -1 of dry material. exceeded content of cadmium and lead in potato tubers had statistically significant effect on total phenol producing, but on the other hand relation between contents of Zn and TP in potato tubers was not statistically confirmed. Also positive correlation between TP and antioxidant activity contents was statistically confirmed. AbstraktZvýšené obsahy kadmia a olova v pôde sa prejavili ich zvýšenou koncentráciou v hľuzách zemiakov v takom rozsahu, že ich obsahy boli niekoľko násobne vyššie (cd 0.106-0.357, Pb 0.318-0.483 mg.kg -1 čh) ako limitná hodnota. Zvýšený obsah zinku sa neprejavil zvýšeným obsahom v hľuzách zemiakov (Zn 4.939-6.868 mg.kg -1 čh). obsah celkových fenolov (cP) vo vzorkách zemiakov z hontianskeho a Banskoštiavnického regiónu bol v rozmedzí od 263.59 do 920.38 mg.kg -1 sušiny. Zvýšený obsah kadmia a olova v zemiakových hľuzách mal štatisticky významný vplyv na produkciu celkových fenolov, ale naopak, vzťah medzi obsahmi Zn a cP neboli štatisticky potvrdené. Avšak pozitívna korelácia medzi cP a antioxidačnou aktivitou bola štatisticky preukazná.

Potatoes – A crop resistant against input of heavy metals from the metallicaly contaminated soil

“…The Cd (Pb, Zn) content in Slovakian potato cultivars were in intervals 0.028 -0.357 (ND -0.638 and 0.189 -6.10 mg/kg FM, respectively)(Musilová, Jónášová, and Poláková 2011a;Musilová et al 2011bMusilová et al , 2013. Similar results were published also by other authors.…”

Effect of Boiling on the Nutritional Value, Phytochemical Contents, and Antioxidant Activity of Commonly Consumed Potato (<i>Solanum tuberosum </i>L.) Varieties in Bangladesh

“…Hence, the trace heavy metal content in potato is an important consideration [51]. Several studies detected lead, chromium, and cadmium at different levels in the potatoes grown in different parts of Turkey and Slovakia [23,51,52], where the levels obtained for these metals were above the FAO/WHO highest acceptable limits [53]. In the present study, when these heavy metals were examined, only lead was detected, which slightly reduced in both Lal Sheel and Diamant potatoes after boiling.…”

“…The lead levels detected in both varieties before and after boiling were slightly higher than the FAO/WHO acceptable limit [53]. Genotype, potato cultivation close to the polluted area, use of fertilizer, and heavy metal concentration in the soil could be the cause for the difference in heavy metal contamination in the potatoes of different areas [23,51,52]. Absence of toxic metals or presence below the permissible level is good for the quality of a food.…”